These are cool shutter glasses that let you see a true 3d image on a flat screen.
To make the brain see a 3D image, you have to ensure that each eye recieves a different image. I wrote a little computer game in back in highschool (if you're curious, you can get it here), and decided that if I alternated rendering left-eye frames and right-eye frames and ensured that each eye only saw the correct rendering, the image would appear 3d.
In order to do this, i put two cardboard discs with wedges cut out (ghetto, I know) on motors to be spun in front of each eye. Attached to the side of the glasses are infrared emitter detector pairs which the discs would spin through, allowing me to get phase feedback from each rotor. Basically as the discs spun, I could retrieve a square wave from the sensors telling me when the corresponding eye was blocked.
I then needed a signal from my computer telling me which eye the currently drawn frame was for. I originally intended to use a parallel or serial port but my laptop only has USB's...I decided on yet another low budget solution and taped a lightsensor to the lower right hand corner of the screen, and altered my program to draw a small black square there on left eye frames, and a small white square on right eye frames. I then put this signal through phase locked loops with the feedback signals from the rotors, threw in a PID motor controller, and soon I had true 3d images popping out of my monitor.
|
Here you can see the two slotted discs nicely. And yes, I know one of them is bent. |
|
The circuit in all its glory. Notice all the bypass capacitors...running motors from an analog circuit is a bitch. |